Shuttle mechanism.



B. H. THBISBN n G. S. KELLER.

SHUTTLE MEGHANISM.

APPLICATION FILED MAY 13, 1909.

Patented Jan. 24, 1911 l UNITED .STATES PATENT cierren.'

A:BRUNO H. THEISEN AND GEORGE S. KELLER, OF MINNEAPLIS, MINNESOTA.

SHUTTLE MECHANISMi.

To all whom it 'may concern.'

Be it known that We, BRUNO H. THEISEN l and GEORGE S. Knnnnmboth of Minneapolis,

Hennepin county, Minnesota, have invented. certain new and useful Improvements 1n Shuttle Mechanism, of which the following is a specification.

. The object of this invention is to provide an improved shuttle device for use in con-I .nection with. a stitching machine and particularly one that is adapted for a leather stitchingmachine, in which oscillating jaws are provided, one carrying an awl and-they i other a needle, the awl beingl rst forcer.

through the material in one direction' and the needle passed through the hole in the -xfother direction to engage and draw the thread through the material.

Our invention consists' generally in vari-l ous constructions and combinations, all as hereinafterdescribed and particularly point- A ed out in the claims.

-. In the accompanyingdrawings, forming part ofthis specification, Figure 1 is a detail'vievv of a portion .of a work plate andthe oscillating needle and awl jaws of a ma chine embodying our invention, Fig. 2 is a sectional View o n the line X-X of Fig. 1, Fig. 3 is a detail view, illustrating the needle drawing the thread through the material,"

Fig. 1 is a similar view, illust-rating the position ot the parts when the shuttle has detar-.hed the thread from the needle, Fig. 5.

' -s a view, illustrating the mechanism for operating the shuttle, Fig. 6 1s an edge vlew of a shuttle with the cover open andshowing the upper thread tension.

-In the drawing, 2 represents a jaw, loosely mounted on the shaft 3 and oscillated there'- on by a rod 4, carrying a needle 5 pro` --vided with a' notch 6. 7 is a secondary jaw secured to the jaw 2 by a bolt 8 and capable of'oscillating on said boltas a' pivot to and from the jaw 2 for the purpose of feeding the material.

9 is a work plate having an opening l() therein and 11 is a horn mounted on the jaw 7 and provided with an awl 12. This l awl is adapted to` pass up through the work plate and punch a hole through the material thereon'during the downward oscillation of Speci-catlon of Letters Patent.

-Application filed Hay 13, 1909. Serial No. 495,742.

i The upper thread of the machine-isV carried by a shutt-le and the threads are interlocked and the stitch completed in theman- -ner,- which we willnow proceed to describe 1 3 is a shuttle'having a stud 14 mbunted 1n bearings 15 and' carrying a pinion 16 (seeFlg. 2).V A plug 17 is held in engagement with the stud 14 by'a spring-1S for the y purpose of preventing too free movement of' the shuttle'. pocket 19 is provided in the shuttle, whereln a' coilof the upper thread '1s placed and ledfouttherefrom through a `hole 20, its feed-being regulated by a `tension device 21 o`n the cover 22 leading to thev pocket. The cover 22 is of theusua, construction, and ,is hinged at one sidef to a plvotpin shown in dotted lines in the drawings. 'Said cover fits closely within the shuttle casing and is held therein by friction.l The cut away portion or notch Vin the outer edge of the cover serves' as a means for forcing the cover from the shuttle easing to open position, as shown in Fig. 6. 4The free end ofthe thread is carriedaround the edge of -the shuttle. The shuttle is provided with 'a horn 2,3 that is adapted'to pass throu h a loop formed :in the lower thread when alle needle draws it up through the hole in the material that is being. -stitched and the'revolution of the shuttle by the mechanism described, will lift the thread off the needle and carry it around the shuttle an over the upper thread, that is, the moveme t of the shuttle will cause the upperkthre d 'to be passed through the loop formed in he lower thread, so that when the stitch is drawn up, loops will be formed in lboth threads and they will be interlocked at a point about midway of the hole Vin the material. It is not necessary to use a bobbin in connection with this shuttle, as the waxed thread will maintain its spiral formas indicated at Fig. 2,'wit-hout becoming twisted or snarled, and will be fed out of the pocket of the shuttle .as it is revolved.

It will be noted in Fig. 2, that the `point of the horn 23 projects slight-ly beyond the face of the shuttle to insure its engage! means ol a sliding pin 24 that is kept in con-4 tact with the shuttle by a spring The needle segment 2 moves across the out-ward bythe spring 25 against the needle segment. lnasninch as the needle. segmentalways overlaps the shuttle race to a certain extent. said segmentJ will serve as a bearing for the Vshuttle and prevent its dropping' out or being' forced out ot' the' shuttle race.

To prerent. the upper thread -from becoming stiff and inflexible, in a low temperature, we provide a torch device7 having a wiel: QG beneath the shuttle, in position to keep the walls of the pocket warm.

l l i l i i l l i i t To operate the shuttle. we provide a lever Q7, pivoted at- QS'on an arm Q9 and having a curved rack bar 30 at one end adapted to engagetlie teeth of the pinion 16 (see Fig.

The arm 2S) 'is pivoted at .Ztlfto the faune of the machine, and is adapted to be raised to permit access to or the removal of the l shuttle. 'llie opposite end of the lever Q7 has asliding connection with a-pitman rod 31fb v means of a slot 32 therein. An adjustable screw device is provided for the purpose 'of ref *nilating thetravel of the end of the lever in the slot and-consequently timing. tlieiuovenient Aof the shuttle. 'lhe pitina'n rod is operated by' a am mechanism, which we have not thought neeessar \Y to illustrate in this application.'

We claim as our inventi on 1'- 1. A stitching machine including in conibination. a supportingl member having a shuttle race. formed therein.. a needle. segment located in front of said shuttle race` and movingr in a plane substantiall;r parallel with the front face of said' shuttlerace, a needle carried bv said segment. a shuttle located in said shuttle race, and having a loop engaging:T horn, and means for forcing: said vshuttle, and horn outwardly toward said needle segment. p i

2.' A stitching machine including in combination7 a. supporting' member, a' shuttle race formed in said supporting member, a needle segment located in front of said shuttle ace, and moving in a plane substantially parallel with the front face of the .shuttle race, a needle carried thereby, a shuttle located in said shuttle race. and having an outwardly turned loop engaging horn. and means'l'or yieldingbv fort-ine; said loop engaging; horn bevond the face of the shuttle race. and into the path 'of the loop carried bythe needle."

l 3. A stitching machine including in coinbinatiion. an arm, a shuttle race formed in said arm` a shuttle mounted in said race7 a driving' stud ior said shuttle rotatably' i'nounted iu -said arm, a. pinion secured on .saidv stud, means for engaging said ,pinion tor rotating' the same.4 a iitiedle segment., let-ated in front elrthe'sliu'ttle. race, and movin; in a pla ne parallel 'ith the t'aee ot' the shuttle race. :l needle carried the'rcbv, and means torpivotally supporting said arm whereby tlie'same 'may be swung abouty its pivot for positit'm'ing' the shuttle i'aee for the removal of tlieshuttle.

1. stitching' machine iiiieluding' in coni-- bination. an arm. a shuttle race t'ormedin said arm. a shuttle mounted in said race, a shuttle operating' stud rotatably mounted in.T said arm, a pinion secured on said stud. a lever pirotallv carried b r said arm and having a rat-lt bar engaging said pinion. means tot' oscillating said lerei' to rotate said pinion and shuttle, a needle segment located in i front of the shuttle` race. and movin;r in a pla ne silbstantiail;Y parallel with the face of the shuttle race. a needle carried thereby and means for pirotallv supporting sait arm wherebi` the same may be swung' about its pivot. to position the shuttle. race for the removal otthe shuttle.

.s'tit-.hinfLv machine includingr in combination. a supporting member. a.'sh\lttle race formed therein. a shuttle mounted in said shuttle race. a shuttle operating` stud rotatablY mounted in said member, a. pinion.l mounted on said stud. an oscillating lever having' a rack bar engagingA said pinion. an operating' rod adjustablv connected with said lever. a needle Segment located vin front of said shuttle race. and moving' in a plane substantiallyparallel with the ate of the shuttle. and a needle carried thereby.

(i. stitchingl machine including iti combination. a supporting` member` a shuttle race formed therein, a shuttle mounted in said race. means tot' operating said shuttle, including'. a pinion. an oscillating lever haviner a rack bai.' engaging said pinion, a stud 'carried b v said lever.- a rod lravin5 1 a loose slotted connection with said stud, andmeansj for adjusting the length of said Slot for regulating' the stroke ol' the rack bar. ln witness whereof. we have hereunto Set uur hands thislth dav of AXpril. 1909.

BRUNO H. THESEX. GllOll .lli S. KELLER. ll'itnesses .Tessin M. SI5-Linux, J. Brix'o'rox. 

